Advance Wayland and KDE package bring-up

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/kde/kf6-kwindowsystem/source/src/kwaylandextras.cpp

@@ -0,0 +1,66 @@
+/*
+    This file is part of the KDE libraries
+    SPDX-FileCopyrightText: 2021 Aleix Pol <aleixpol@kde.org>
+    SPDX-FileCopyrightText: 2023 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+#include "kwaylandextras.h"
+
+#include "kwindowsystem.h"
+#include "kwindowsystem_p.h"
+
+#include <QTimer>
+
+KWaylandExtras::KWaylandExtras()
+    : QObject()
+{
+}
+
+KWaylandExtras::~KWaylandExtras() = default;
+
+KWaylandExtras *KWaylandExtras::self()
+{
+    static KWaylandExtras instance;
+    return &instance;
+}
+
+void KWaylandExtras::requestXdgActivationToken(QWindow *window, uint32_t serial, const QString &app_id)
+{
+    auto dv2 = dynamic_cast<KWindowSystemPrivateV2 *>(KWindowSystem::d_func());
+    if (!dv2) {
+        // Ensure that xdgActivationTokenArrived is always emitted asynchronously
+        QTimer::singleShot(0, [serial] {
+            Q_EMIT KWaylandExtras::self()->xdgActivationTokenArrived(serial, {});
+        });
+
+        return;
+    }
+    dv2->requestToken(window, serial, app_id);
+}
+
+quint32 KWaylandExtras::lastInputSerial(QWindow *window)
+{
+    auto dv2 = dynamic_cast<KWindowSystemPrivateV2 *>(KWindowSystem::d_func());
+    if (!dv2) {
+        return 0;
+    }
+    return dv2->lastInputSerial(window);
+}
+
+void KWaylandExtras::exportWindow(QWindow *window)
+{
+    if (auto dv2 = dynamic_cast<KWindowSystemPrivateV2 *>(KWindowSystem::d_func())) {
+        dv2->exportWindow(window);
+    }
+}
+
+void KWaylandExtras::unexportWindow(QWindow *window)
+{
+    if (auto dv2 = dynamic_cast<KWindowSystemPrivateV2 *>(KWindowSystem::d_func())) {
+        dv2->unexportWindow(window);
+    }
+}
+
+#include "moc_kwaylandextras.cpp"